Note: This site is for reviewing legacy plan of work data from 2007-2011. If you are looking for the current plan of work interface, visit pow.nmsu.edu.
Impact Report
| For plan | Nutrient Management for Sustainable Soil Productivity |
| Date | January 21, 2011, 7:26 pm |
| For Objective | Long-term Show long-term objectives |
| Impact Report | A project with the Southern Region Water Quality group demonstrated that the Soil Test Interpretation workbook is able to adequately predict nitrogen availability to plants when the source material is known. Nitrogen fertilization under furrow or flood conditions was shown to be highly inefficient where a significant portion of the nitrate-N observed before irrigating had leached below the sampling zone. High levels of nitrates in subsoils from selected farms also demonstrated the mobility of nitrate and the need to manage irrigation water to avoid excessive leaching. Over-winter irrigation events are most likely to bring about leaching events with shallow-rooted annual crops. Most private consultants report that yearly samples are taken but different laboratories are used for determining the nutrient values. Of those that do re-use the NMSU lab it amounts to 1 or 2%. Fertilizer cost, over the past 5 years, has been shown to be the largest single controller of application rates. However, credit is much more likely to be given to manure and effluent water applications as well as previous legumes. |